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CITY OF EVERETT STORMWATER MANAGEMENT MANUAL <br /> Debris Barriers(e.g.,Trash Racks) <br /> Date <br /> Drainage <br /> System Maintenance Activities and Conditions <br /> Frequency Feature ✓ ✓ ✓ ✓ Problem Conditions to Check For That Should Exist <br /> M,S General Trash and Debris Trash or debris that is plugging more than 20 Barrier cleared to design flow capacity. <br /> percent of the openings in the barrier. <br /> A General Damaged/Missing Bars are bent out of shape more than 3 inches. Bars in place with no bends more than three- <br /> Bars. fourth inch. <br /> A General Damaged/Missing Bars are missing or entire barrier missing. Bars in place according to design. <br /> Bars. <br /> A General Damaged/Missing Bars are loose and rust is causing 50 percent Barrier replaced or repaired to design <br /> Bars. deterioration to any part of barrier. standards. <br /> A General Inlet/Outlet Pipe Debris barrier missing or not attached to pipe. Barrier firmly attached to pipe. <br /> If you are unsure whether a problem exists,please contact a professional engineer. <br /> Key: <br /> (M) Monthly from October through April. <br /> (A) Once in late summer(preferably September) <br /> (S) After any major storm(use 1 inch in 24 hours as a guideline). <br /> Appendices <br /> F-17 <br />